/*
 * Alloy Analyzer
 * Copyright (c) 2002 Massachusetts Institute of Technology
 *
 * The Alloy Analyzer is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * The Alloy Analyzer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with the Alloy Analyzer; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package alloy.ast;

import alloy.semantic.LocalScope;
import alloy.transform.LeafIdMap;

public class SumIntExpr extends TreeNode implements IntExpr, VarCreator {

    /**
     * index of decls in child list
     */
    private static final int DECLS_INDEX = 0;

    /**
     * index of expr in child list
     */
    private static final int EXPR_INDEX = 1;

    /** local scope associated with this */
    private LocalScope _localScope;
    
    /** leaf id map associated with this */
    private LeafIdMap _leafIdMap;

    public SumIntExpr(Location location_, Decls decls_, IntExpr expr_) {
        super(location_, decls_, expr_);
    }


    public SumIntExpr(Decls decls_, IntExpr expr_) {
        super(Location.UNKNOWN, decls_, expr_);
    }



    //GET AND SET METHODS

    /**
     * gets the decls of this
     * @return the {@link Decls}
     */
    public Decls getDecls() {
        return (Decls)childAt(DECLS_INDEX);
    }

    /** set the Decls of this */
    public void setDecls(Decls newChild_) {
        setChild(DECLS_INDEX, newChild_);
    }

    /**
     * gets the expr of this
     * @return the {@link IntExpr}
     */
    public IntExpr getExpr() {
        return (IntExpr)childAt(EXPR_INDEX);
    }

    /** set the Expr of this */
    public void setExpr(IntExpr newChild_) {
        setChild(EXPR_INDEX, newChild_);
    }

    public Node getBody() {
        return childAt(EXPR_INDEX);
    }

    /** set the Body of this */
    public void setBody(Node newChild_) {
        setChild(EXPR_INDEX, newChild_);
    }

    /**
     * gets the local scope of this
     * @return the local scope
     */
    public LocalScope getLocalScope() {
        return _localScope;
    }

    /**
     * sets the local scope of this
     * @param localScope_ the new local scope for this
     */
    public void setLocalScope(LocalScope localScope_) {
        _localScope = localScope_;
    }

    /**
     * gets the leaf id map of this
     * @return the leaf id map
     */
    public LeafIdMap getLeafIdMap() {
        return _leafIdMap;
    }

    /**
     * sets the leaf id map of this
     * @param leafIdMap_ the new leaf id map for this
     */
    public void setLeafIdMap(LeafIdMap leafIdMap_) {
        _leafIdMap = leafIdMap_;
    }

    /**
     * accept an AST visitor
     * @param visitor_ the visitor
     */
    protected void acceptVisitor(ASTVisitor visitor_) {
        visitor_.visit(this);
    }

    /**
     * accept a returning AST visitor
     * @param visitor_ the visitor
     * @return the Object returned by the visitor
     */
    protected Object acceptReturnVisitor(ASTReturnVisitor visitor_) {
        return visitor_.visit(this);
    }

    public String nodeString() {
        return "sum " + getDecls().nodeString() + " | " +
        getExpr().nodeString();
    }

    public String toString()
    {
        return nodeString();
    }

    public Object copy() {
	SumIntExpr ret = (SumIntExpr)super.copy();
	ret._leafIdMap = null;
	// localScope copying for atomization--should confirm this doesn't affect other code 
	ret._localScope = _localScope.copy();
	return ret;
    }

    public boolean isSameAs(Node node_) { return false; }
    
}
